Method for Matching Clutch Pressure and Torque of Automatic Transmission

Abstract

The present invention relates to a method for matching the clutch pressure and torque of an automatic transmission, and the steps are as follows: 1) Determine whether the working performance data of the clutch and the engine meet the acquisition conditions for matching; 2) If the acquisition conditions are met, perform data acquisition and processing, and the data acquisition and processing include calculation of the acquisition deviation of the data and update of the number of acquisition samples; 3) According to the working performance data of the clutch and the processed data obtained from the data acquisition and processing, determine whether the update conditions for matching are met; 4) If the update conditions are met, perform matching update processing to make the corresponding relationship between the pressure and torque of the clutch match. After the update processing, the corresponding relationship between the clutch pressure and the clutch torque is matched, realizing the automatic, real-time and accurate matching of the corresponding relationship between the clutch pressure and the torque, making the power transmission of the whole vehicle accurate and stable, and generally improving the driving performance and comfort of the whole vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive automatic transmissions, and particularly relates to a method for matching the clutch pressure and torque of an automatic transmission. Background Art

[0002] In the power transmission process of an automobile, the clutch in an automatic transmission plays a role in transmitting power from above to below. During operation, by applying a certain engagement pressure to the clutch, a certain torque is generated on the clutch, thereby connecting the power transmission between the engine, the automatic transmission, and the wheels, and then driving the vehicle to move forward. Among them, when the pressure of the clutch is too small, the torque transmitted from the engine to the clutch is insufficient, affecting the driving of the entire vehicle. Therefore, a corresponding relationship needs to be satisfied between the pressure and torque of the clutch. Once the corresponding relationship between the two does not match, it will cause inaccurate power transmission of the entire vehicle, thereby triggering a series of problems, such as engine runaway speed, engine stalling, and transmission chain impact, etc., generally deteriorating the driving performance and comfort of the entire vehicle. Summary of the Invention

[0003] The purpose of the present invention is to provide a follow-up acceleration control method for opening and closing a motorized sliding door or a rear door of an automobile in view of the deficiencies of the prior art, which can realize automatic, real-time, and accurate matching of the corresponding relationship between the clutch pressure and torque.

[0004] The technical solution of the present invention is as follows: A method for matching the clutch pressure and torque of an automatic transmission, the steps are as follows:

[0005] 1) Determine whether the working performance data of the clutch and the engine meet the acquisition conditions for matching;

[0006] 2) If the acquisition conditions are met, perform data acquisition processing, and the data acquisition processing includes calculation of data acquisition deviation and update of the number of acquisition samples;

[0007] 3) According to the working performance data of the clutch and the processed data obtained from the data acquisition processing, determine whether the update conditions for matching are met;

[0008] 4) If the update conditions are met, perform matching update processing to make the corresponding relationship between the pressure and torque of the clutch match.

[0009] The step 1) includes:

[0010] Determine whether the requested torque of the clutch is greater than or equal to the first torque threshold. If so, the acquisition conditions are met; otherwise, they are not met.

[0011] The step 1) further includes

[0012] If the requested torque of the clutch is greater than or equal to the first torque threshold, then perform at least one of the following steps:

[0013] Determine whether the lubrication flow rate of the clutch is less than the flow rate threshold within a preset time period. If so, the acquisition condition is met; otherwise, it is not met.

[0014] Determine whether the oil temperature in the transmission is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold within the preset time period. If so, the acquisition condition is met; otherwise, it is not met.

[0015] Determine whether the effective torque of the engine is greater than or equal to the second torque threshold within the preset time period. If so, the acquisition condition is met; otherwise, it is not met.

[0016] Determine whether the real-time speed of the engine is greater than or equal to the first speed threshold and less than or equal to the second speed threshold within the preset time period. If so, the acquisition condition is met; otherwise, it is not met.

[0017] After the preset time period, perform at least one of the following steps:

[0018] Determine whether the change rate of the effective torque of the engine is greater than or equal to the third torque threshold and less than or equal to the fourth torque threshold. If so, the acquisition condition is met; otherwise, it is not met.

[0019] Determine whether the change rate of the actual torque of the clutch is greater than or equal to the fifth torque threshold and less than or equal to the sixth torque threshold. If so, the acquisition condition is met; otherwise, it is not met.

[0020] When the change rate of the effective torque of the engine is greater than or equal to the third torque threshold and less than or equal to the fourth torque threshold, and at the same time the change rate of the actual torque of the clutch is greater than or equal to the fifth torque threshold and less than or equal to the sixth torque threshold, determine whether the clutch is in the gear micro-slip state. If not, the acquisition condition is not met; if so, perform the following steps:

[0021] Determine whether the change rate of the difference between the real-time speed of the engine and the speed of the input shaft connected to the clutch is greater than or equal to the third speed threshold and less than or equal to the fourth speed threshold; and whether the difference between the real-time speed of the engine and the speed of the input shaft connected to the clutch is greater than or equal to the fifth speed threshold and less than or equal to the sixth speed threshold. If so, the acquisition condition is met; otherwise, it is not met.

[0022] The acquisition deviation calculation calculates the acquisition deviation value based on the effective torque of the engine and the requested torque of the clutch;

[0023] The update of the collected sample number is to calculate the collected sample number by sequential incremental calculation.

[0024] Step 3) includes:

[0025] Judge whether the requested torque of the clutch is less than the first torque threshold. If not, the matching update condition is not satisfied. If so, make at least one of the following judgments: whether the collected sample number is greater than or equal to the sample threshold; whether two consecutive adjacent collected deviation values are greater than or equal to the deviation threshold. If so, the matching update condition is satisfied; otherwise, it is not satisfied.

[0026] Step 4) includes:

[0027] Apply the collected deviation value obtained by the collected deviation calculation to the clutch pressure to obtain the applied clutch pressure, and smooth the applied clutch pressures to obtain the matched clutch pressure, and the corresponding relationship between the matched clutch pressure and the clutch torque is matched.

[0028] After obtaining the matched clutch pressure, check and monitor the clutch pressure.

[0029] It also includes the following step: self-diagnose whether the application of the matching method is normal.

[0030] Beneficial effects obtained by adopting the above technical solutions:

[0031] By judging whether the working performance data of the clutch and the engine meet the matching collection conditions; if the collection conditions are met, data collection and processing are performed, and the data collection and processing include the calculation of the collection deviation and the update of the collected sample number; according to the working performance data of the clutch and the processed data obtained by the data collection and processing, judge whether the matching update conditions are met; if the update conditions are met, perform matching update processing to make the corresponding relationship between the pressure and the torque of the clutch match. The corresponding relationship between the clutch pressure and the clutch torque after the update processing is matched. Therefore, in the dual-clutch automatic transmission, the corresponding relationship between the clutch pressure and the torque can be automatically, real-time and accurately matched, making the vehicle power transmission accurate and stable, solving problems such as engine overspeed, engine stalling and transmission chain impact caused by non-matching, and generally improving the vehicle driving performance and comfort.

[0032] The present invention will be further described below in conjunction with the accompanying drawings of the specification and specific embodiments. Description of the Drawings

[0033] Figure 1 It is a flow diagram of the present invention;

[0034] Figure 2Logic flowchart for determining whether the matching acquisition conditions are met;

[0035] Figure 3 Logic flowchart for matching update processing. Detailed implementation mode

[0036] Example 1: Refer to Figures 1 to 3 , a method for matching the clutch pressure and torque of an automatic transmission, comprising the following steps:

[0037] S1: Determine whether the matching acquisition conditions are met.

[0038] Specifically, it is determined whether the matching acquisition conditions are met according to the working performance data of the clutch and the engine. The working performance data of the clutch and the engine includes: the requested torque, actual torque, lubricating flow rate request, input shaft speed of the clutch, the oil temperature of the transmission, the effective torque and real-time speed of the engine, etc. Among them, the requested torque is the torque requirement that the clutch theoretically needs to meet, and the lubricating flow rate request is also the lubricating flow rate requirement that the clutch needs to meet. These working performance data can all be obtained by existing means. For example, they can be measured by sensors set in the transmission, or calculated based on known data. This embodiment will not elaborate on this.

[0039] S2: Perform data acquisition processing.

[0040] Specifically, if the acquisition conditions are met, data acquisition processing is performed. The data acquisition processing includes calculation of the acquisition deviation and update of the acquisition sample number. Among them, the acquisition deviation calculation is to calculate the acquisition deviation value according to the effective torque of the engine and the requested torque of the clutch. The acquisition sample number update is to perform sequential incremental calculation on the acquisition sample number. For example, if the initial acquisition sample number is 0, then each time a sample is acquired, it is incremented by one. For example, the second acquired sample is counted as 1.

[0041] S3: Determine whether the matching update conditions are met.

[0042] Specifically, it is determined whether the matching update conditions are met according to the working performance data of the clutch and the processed data obtained from the data acquisition processing.

[0043] S4: Perform matching update processing.

[0044] Specifically, if the update conditions are met, matching update processing is performed to make the corresponding relationship between the pressure and torque of the clutch match.

[0045] The above step S1 specifically includes:

[0046] Determine whether the requested torque of the clutch is greater than or equal to the first torque threshold. If so, the acquisition condition is satisfied; otherwise, it is not satisfied.

[0047] If the requested torque of the clutch is greater than or equal to the first torque threshold, at least one of the following steps is further required:

[0048] Determine whether the lubrication flow rate of the clutch is less than the flow rate threshold within a preset time period. If so, the acquisition condition is satisfied; otherwise, it is not satisfied.

[0049] Determine whether the oil temperature in the transmission is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold within the preset time period. If so, the acquisition condition is satisfied; otherwise, it is not satisfied.

[0050] Determine whether the effective torque of the engine is greater than or equal to the second torque threshold within the preset time period. If so, the acquisition condition is satisfied; otherwise, it is not satisfied.

[0051] Determine whether the real-time speed of the engine is greater than or equal to the first speed threshold and less than or equal to the second speed threshold within the preset time period. If so, the acquisition condition is satisfied; otherwise, it is not satisfied.

[0052] In the above steps, in order to accurately calculate the preset time period, the timer can be used for timing after determining that the requested torque of the clutch is greater than or equal to the first torque threshold.

[0053] After the preset time period, at least one of the following steps is further required:

[0054] Determine whether the change rate of the effective torque of the engine is greater than or equal to the third torque threshold and less than or equal to the fourth torque threshold. If so, the acquisition condition is satisfied; otherwise, it is not satisfied.

[0055] Determine whether the change rate of the actual torque of the clutch is greater than or equal to the fifth torque threshold and less than or equal to the sixth torque threshold. If so, the acquisition condition is satisfied; otherwise, it is not satisfied.

[0056] When the change rate of the effective torque of the engine is greater than or equal to the third torque threshold and less than or equal to the fourth torque threshold, and at the same time the change rate of the actual torque of the clutch is greater than or equal to the fifth torque threshold and less than or equal to the sixth torque threshold, it is also necessary to determine whether the clutch is in the gear micro-slip state. If not, the acquisition condition is not satisfied; if so, the following steps are carried out:

[0057] Determine whether the change rate of the difference between the real-time speed of the engine and the speed of the input shaft connected to the clutch is greater than or equal to a third speed threshold and less than or equal to a fourth speed threshold; and whether the difference between the real-time speed of the engine and the speed of the input shaft connected to the clutch is greater than or equal to a fifth speed threshold and less than or equal to a sixth speed threshold; if so, the acquisition condition is satisfied, otherwise it is not satisfied.

[0058] The specific steps of step S3 include:

[0059] Determine whether the requested torque of the clutch is less than a first torque threshold. If not, the matching update condition is not satisfied. If so, make at least one of the following judgments: whether the number of acquisition samples is greater than or equal to a sample threshold; whether two consecutive adjacent acquisition deviation values are greater than or equal to a deviation threshold; if so, the matching update condition is satisfied, otherwise it is not satisfied.

[0060] The specific steps of step S4 include:

[0061] Apply the acquisition deviation value calculated through the acquisition deviation to the clutch pressure to obtain the applied clutch pressure, and smooth the applied clutch pressures to obtain the matched clutch pressure, and the corresponding relationship between the matched clutch pressure and the clutch torque is matched.

[0062] To make the matching more guaranteed, after obtaining the matched clutch pressure, the clutch pressure can be checked and monitored. Specifically, the following steps can be used for checking and monitoring:

[0063] Determine whether the clutch pressure is within the required range, and check whether the matched clutch pressure is within the range of a reasonable upper limit and lower limit;

[0064] Judge whether the clutch pressure meets the monotonicity test, that is, check whether the matched clutch pressure meets the requirement of monotonically increasing.

[0065] After the matching is completed, the clutch pressure curve can also be updated, that is, update the clutch pressure curve with the matched clutch pressure; update the acquisition deviation of the clutch matching, that is, clear the acquisition deviation of the clutch matching; update the number of acquisition samples of the clutch matching, and clear the number of acquisition samples of the clutch matching. In addition, the successful times of the clutch matching can also be updated, that is, perform a sequential increment operation on the successful times of the clutch matching, and the initial value of this sequential increment operation can be 0; update the stroke distance of the clutch, and the stroke distance is the distance that the clutch moves during the process of the power between the engine and the transmission from disconnection to connection, and the value of the stroke distance is calculated and updated in real time by the transmission control unit.

[0066] To avoid abnormal matching during the matching process due to system anomalies or errors, real-time self-diagnosis is performed on whether the application of the matching method is normal. The self-diagnosis includes: determining whether the difference between the clutch stroke distance calculated in real time and the theoretical stroke distance after clutch matching is greater than or equal to a distance threshold. If so, it is considered abnormal; otherwise, it is normal. When an abnormality occurs, an alarm can be issued through the vehicle's control system to alert the user to promptly detect the abnormality.

[0067] By performing matching acquisition condition determination and matching acquisition processing, and matching update condition determination and matching update processing, the correspondence between the clutch pressure and torque can be made to match. This solves problems such as engine runaway speed, engine stalling, and transmission chain impact caused by mismatching. The correspondence between the clutch pressure and clutch torque is matched, enabling the automatic, real-time, and accurate matching of the clutch pressure and torque correspondence in a dual-clutch automatic transmission, making the vehicle power transmission accurate and stable, and generally improving the vehicle driving performance and comfort.

[0068] Embodiment 2:

[0069] For better understanding, this embodiment exemplarily illustrates the matching method of the clutch pressure and torque of a dual-clutch automatic transmission, as Figure 1 , which includes the following steps:

[0070] Perform matching on the first clutch:

[0071] S1: Determine whether the matching acquisition conditions are met. Specifically, based on the working performance data of the clutch and the engine, determine whether the matching acquisition conditions are met. If so, execute step S2; otherwise, execute step S9;

[0072] S2: Perform data acquisition processing. Specifically, if the acquisition conditions are met, perform data acquisition processing, which includes calculating the acquisition deviation of the data and updating the number of acquisition samples. Then execute step S3;

[0073] S3: Determine whether the matching update conditions are met. Specifically, based on the working performance data of the clutch and the processed data obtained from the data acquisition processing, determine whether the matching update conditions are met. If so, execute step S4; otherwise, execute step S9;

[0074] S4: Perform matching update processing. Specifically, if the update conditions are met, perform matching update processing to make the correspondence between the clutch pressure and torque match.

[0075] S5: Self-diagnose whether the application of the matching method is normal.

[0076] Match the second clutch using the same steps as above. The matching of the first clutch and the second clutch can be carried out simultaneously or successively.

[0077] As Figure 2 , specifically, step S1 includes the following steps:

[0078] S1001: Determine whether the requested torque of the clutch is greater than or equal to the first torque threshold. If so, execute step S1002; otherwise, execute step S1014.

[0079] S1002: Start the timer, and then execute step S1003.

[0080] S1003: Determine whether the lubrication flow rate request of the clutch is less than the flow rate threshold. If so, execute step S1004; otherwise, execute step S1014.

[0081] S1004: Determine whether the oil temperature in the transmission is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold. If so, execute step S1005; otherwise, execute step S1014.

[0082] S1005: Determine whether the effective torque of the engine is greater than or equal to the second torque threshold. If so, execute step S1006; otherwise, execute step S1014.

[0083] S1006: Determine whether the real-time speed of the engine is greater than or equal to the first speed threshold and less than or equal to the second speed threshold. If so, execute step S1007; otherwise, execute step S1014.

[0084] S1007: Determine whether the timing value of the timer is greater than or equal to the first time threshold. If so, execute step S1008; otherwise, execute step S1003.

[0085] S1008: Determine whether the change rate of the effective torque of the engine is greater than or equal to the third torque threshold and less than or equal to the fourth torque threshold. At the same time, determine whether the duration satisfying this condition exceeds the second time threshold. If so, execute step S1009; otherwise, execute step S1014.

[0086] S1009: Determine whether the change rate of the actual torque of the clutch is greater than or equal to the fifth torque threshold and less than or equal to the sixth torque threshold. At the same time, determine whether the duration satisfying this condition exceeds the third time threshold. If so, execute step S1010; otherwise, execute step S1014.

[0087] S1010: Determine whether the clutch is in the in-gear slight-slip state. If so, execute step S1011; otherwise, execute step S1014.

[0088] S1011: Determine whether the change rate of the difference between the real-time engine speed and the input shaft speed connected to the clutch is greater than or equal to the third speed threshold and less than or equal to the fourth speed threshold. At the same time, determine whether the duration satisfying this condition exceeds the fourth time threshold. If so, execute step S1012; otherwise, execute step S1014.

[0089] S1012: Determine whether the difference between the real-time engine speed and the input shaft speed connected to the clutch is greater than or equal to the fifth speed threshold and less than or equal to the sixth speed threshold. At the same time, determine whether the duration satisfying this condition exceeds the fifth time threshold. If so, execute step S1013; otherwise, execute step S1014.

[0090] S1013: Set whether the matching acquisition condition is satisfied to yes, and then end.

[0091] S1014: Set whether the matching acquisition condition is satisfied to no, and then end.

[0092] Specifically, step S2 includes the following steps:

[0093] Acquisition deviation calculation: Calculate the acquisition deviation value through the effective torque of the engine and the requested torque of the clutch;

[0094] Update of the acquisition sample number: Perform sequential incremental calculation of the acquisition sample number, and the initial value of the acquisition sample number is 0.

[0095] Specifically, step S3 includes the following steps:

[0096] Step 1: Determine whether the requested torque of the clutch is less than the first torque threshold. If so, execute step 2; otherwise, execute step 7.

[0097] Step 2: Determine whether the acquisition sample number is greater than or equal to the first sample threshold. If so, execute step 6; otherwise, execute step 3.

[0098] Step 3: Determine whether the acquisition sample number is greater than or equal to the second sample threshold. If so, execute step 4; otherwise, execute step 7.

[0099] Step 4: Determine whether two consecutive adjacent acquisition deviation values are greater than or equal to the deviation threshold. If so, execute step 6; otherwise, execute step 5.

[0100] Step 5: Determine whether the successful matching times of the clutch are less than or equal to the counting threshold. If so, execute step 6; otherwise, execute step 7.

[0101] Step 6, set whether the matching update condition is met to yes, and then end.

[0102] Step 7, set whether the matching update condition is met to no, and then end.

[0103] Such as Figure 3 , specifically, step S4 includes the following steps:

[0104] S4001: Apply the acquisition deviation value obtained through the acquisition deviation calculation to the clutch pressure to obtain the applied clutch pressure, and then execute step S4002.

[0105] S4002: Smooth the applied clutch pressures to obtain the matched clutch pressures. The matched clutch pressures have the characteristic of linearity, and the corresponding relationship between the matched clutch pressures and the clutch torque is matched. Then execute step S4003 to start checking and monitoring the clutch pressures.

[0106] S4003: Determine whether the clutch pressure is within the range, check whether the matched clutch pressure is within the reasonable upper and lower limits. If so, execute step S4004; otherwise, end.

[0107] S4004: Determine whether the clutch pressure meets the monotonicity test, check whether the matched clutch pressure meets the requirement of monotonic increase. If so, execute step S4005; otherwise, end.

[0108] S4005: Update the pressure curve of the clutch, use the matched clutch pressure to update the pressure curve of the clutch, and then execute step S4006.

[0109] S4006: Update the acquisition deviation value matched by the clutch, clear the acquisition deviation value matched by the clutch, and then execute step S4007.

[0110] S4007: Update the acquisition sample number matched by the clutch, clear the acquisition sample number matched by the clutch, and then execute step S4008.

[0111] S4008: Update the success times of clutch matching, perform a sequential increment operation on the success times of clutch matching. The initial value of the success times of clutch matching is 0, and then execute step S4009;

[0112] S4009: Update the stroke distance of the clutch. The stroke distance is the distance that the clutch moves during the process of the power between the engine and the transmission being disconnected and then connected. The value of the stroke distance is calculated and updated in real time by the transmission control unit, and then end.

[0113] To avoid abnormal matching during the matching process due to system anomalies or errors, real-time self-diagnosis is performed on whether the application of the matching method is normal. The self-diagnosis includes: determining whether the difference between the clutch stroke distance calculated in real time and the theoretical stroke distance after clutch matching is greater than or equal to the distance threshold. If so, it is considered abnormal; otherwise, it is normal. When an abnormality occurs, an alarm can be issued through the vehicle's control system to alert the user to the abnormality in a timely manner.

[0114] Through the above matching steps, the correspondence between the clutch pressure and torque can be matched. This solves problems such as engine runaway speed, engine stalling, and transmission chain shock caused by mismatching. The correspondence between the clutch pressure and the clutch torque is matched, realizing that in a dual-clutch automatic transmission, the correspondence between the clutch pressure and torque can be automatically, real-time, and accurately matched, making the vehicle power transmission accurate and stable, and generally improving the vehicle driving performance and comfort.

Claims

1. A method for matching the clutch pressure and torque of an automatic transmission, characterized in that The steps are as follows: 1) Determine whether the working performance data of the clutch and the engine meet the matching acquisition conditions; 2) If the acquisition conditions are met, perform data acquisition processing, which includes calculating the acquisition deviation of the data and updating the number of acquisition samples; 3) Based on the working performance data of the clutch and the processed data obtained from the data acquisition processing, determine whether the matching update conditions are met; Determine whether the requested torque of the clutch is less than the first torque threshold. If not, the matching update conditions are not met. If so, perform at least one of the following judgments: whether the number of acquisition samples is greater than or equal to the sample threshold; whether two consecutive adjacent acquisition deviations are greater than or equal to the deviation threshold. If so, the matching update conditions are met; otherwise, they are not met; 4) If the update conditions are met, perform matching update processing to make the corresponding relationship between the pressure and torque of the clutch match; Apply the acquisition deviation value obtained by calculating the acquisition deviation to the clutch pressure to obtain the applied clutch pressure, smooth the applied clutch pressures to obtain the matched clutch pressure, and the corresponding relationship between the matched clutch pressure and the clutch torque matches.

2. The method for matching the clutch pressure and torque of an automatic transmission according to claim 1, characterized in that: The step 1) includes: Determine whether the requested torque of the clutch is greater than or equal to the first torque threshold. If so, the acquisition conditions are met; otherwise, they are not met.

3. The method for matching the clutch pressure and torque of an automatic transmission according to claim 2, characterized in that: The step 1) also includes If the requested torque of the clutch is greater than or equal to the first torque threshold, perform at least one of the following steps: Determine whether the lubrication flow rate of the clutch is less than the flow rate threshold within a preset time period. If so, the acquisition conditions are met; otherwise, they are not met; Determine whether the oil temperature in the transmission is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold within the preset time period. If so, the acquisition conditions are met; otherwise, they are not met; Determine whether the effective torque of the engine is greater than or equal to the second torque threshold within the preset time period. If so, the acquisition conditions are met; otherwise, they are not met; Determine whether the real-time speed of the engine is greater than or equal to the first speed threshold and less than or equal to the second speed threshold within the preset time period. If so, the acquisition conditions are met; otherwise, they are not met.

4. The method for matching the clutch pressure and torque of an automatic transmission according to claim 3, characterized in that: After the preset time period, perform at least one of the following steps: Determine whether the change rate of the effective torque of the engine is greater than or equal to the third torque threshold and less than or equal to the fourth torque threshold. If so, the acquisition conditions are met; otherwise, they are not met; Determine whether the change rate of the actual torque of the clutch is greater than or equal to the fifth torque threshold and less than or equal to the sixth torque threshold. If so, the acquisition conditions are met; otherwise, they are not met.

5. The method for matching the clutch pressure and torque of an automatic transmission according to claim 4, characterized in that: When the change rate of the effective torque of the engine is greater than or equal to the third torque threshold and less than or equal to the fourth torque threshold, and at the same time the change rate of the actual torque of the clutch is greater than or equal to the fifth torque threshold and less than or equal to the sixth torque threshold, determine whether the clutch is in the gear micro-slip state. If not, the acquisition conditions are not met. If so, perform the following steps: Determine whether the change rate of the difference between the real-time speed of the engine and the speed of the input shaft connected to the clutch is greater than or equal to a third speed threshold and less than or equal to a fourth speed threshold; and whether the difference between the real-time speed of the engine and the speed of the input shaft connected to the clutch is greater than or equal to a fifth speed threshold and less than or equal to a sixth speed threshold; if so, the acquisition condition is satisfied, otherwise it is not satisfied.

6. The method for matching the clutch pressure and torque of an automatic transmission according to claim 1, characterized in that: The acquisition deviation calculation calculates an acquisition deviation value based on the effective torque of the engine and the requested torque of the clutch; The acquisition sample number update performs a sequential increment calculation on the acquisition sample number.

7. The method for matching the clutch pressure and torque of an automatic transmission according to claim 1, characterized in that: After obtaining the matched clutch pressure, check and monitor the clutch pressure.

8. The method for matching the clutch pressure and torque of an automatic transmission according to claim 1, wherein, It further includes the following steps: Self-diagnose whether the application of the matching method is normal.

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